The winning team comprised Anna Poole (18), of Wyndham, Callum Geddes (18), Alexandra, Kendra McRae (17), Invercargill, Heather McLeod (18), Dunedin, Jayne Beattie (15), Black Rock, and Lisa Milliken (14), Queenstown.
Franklin-Thames Valley was second and Canterbury third at the end of the three-day event at Oamaru race-course.
Captain Anna Poole was delighted with the team's success. It had been a great competition and they had all enjoyed it, she said.
She attributed the team's success to "lots of training" and the members all having "really good support from home".
McRae was second overall in the highest placed AI rider for riders 17-21, and Anna Poole fifth. The AI Challenge Cup was won by Anna Hinton on Sexy B from Taranaki.
The Dorothy Campbell Challenge Trophy for the highest placed DCrider (16 years and under) was won by Loran Mathis on Flintoff, Waikato.
The same trophy was won by Loran's mother, Lynley, in 1976 and heraunt, Nicoli Fife, in 1973.
It was a double victory for Otago-Southland, which also won the training team competition, with Cate Howie on Just Jackson the highest-placed overall rider in that section.
That team comprised Hannah Johnston (15), Mosgiel, Gabriella Perry (13), Dunedin, and Howie (16), Wanaka.
Organising committee chairman Bill Phiskie said it had been a "terrific" committee to work with and they had given "110%".
A "superb" cross-country course would now be handed over. While some riders had a "pretty rugged time" on that course, he was proud of everyone, he said.
